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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (6): 966-971.DOI: 10.16553/j.cnki.issn1000-985x.2026.0010

• 研究论文 • 上一篇    下一篇

TiO2/CdS/α-Fe2O3异质结构光阳极的制备及性能研究

苏适(), 王立兴, 车致远, 张丽娜, 马晋文()   

  1. 渤海大学物理科学与技术学院,锦州 121000
  • 收稿日期:2026-01-23 出版日期:2026-06-20 发布日期:2026-07-07
  • 通信作者: 马晋文,博士,副教授。E-mail:mjw423@163.com
  • 作者简介:苏适(1988—),男,吉林省人,博士,讲师。E-mail:sushi@qymail.bhu.edu.cn
  • 基金资助:
    渤海大学博士启动基金(0519bs013);渤海大学2022年数理化基础研究专项科研项目(0522xn029);渤海大学2022年自然科学类一般培育项目(0522xn041)

Preparation and Properties of TiO2/CdS/ α -Fe2O3 Heterostructured Photoanodes

SU Shi(), WANG Lixing, CHE Zhiyuan, ZHANG Lina, MA Jinwen()   

  1. Collage of Physical Science and Technology,Bohai University,Jinzhou 121000,China
  • Received:2026-01-23 Online:2026-06-20 Published:2026-07-07

摘要: 为改善TiO2光阳极的光吸收范围窄、光生载流子复合率高等问题,本研究采用水热法与连续离子层吸附反应法相结合的工艺,成功制备了TiO2/CdS/α-Fe2O3三元异质结薄膜。利用X射线衍射、扫描电子显微镜、紫外-可见光吸收光谱和三电极光电测试系统对所制备光阳极的晶相、微观形貌、光学特性和光电化学性质进行了系统的表征和分析。测试结果显示,TiO2纳米片表面均匀负载CdS纳米颗粒,α-Fe2O3以规整纳米刺形态致密生长于复合体系表面;TiO2/CdS/α-Fe2O3三元异质结薄膜的光吸收边红移至595 nm,较纯TiO2和TiO2/CdS二元复合薄膜有显著拓宽,其最大光电流密度达2.37 mA/cm2,分别为纯TiO2和TiO2/CdS的24倍和1.9倍。研究表明,TiO2/CdS/α-Fe2O3光阳极的性能提升归因于CdS和α-Fe2O3拓宽了TiO2的光响应范围,以及三者形成了阶梯式能级结构,有效促进光生电子-空穴对的分离与输运,降低载流子复合率。本研究为TiO2基光阳极的结构优化与性能提升提供了可行方案和实验依据。

关键词: TiO2; CdS; α-Fe2O3; 异质结薄膜; 光电化学性能

Abstract: To address the issues of a narrow light absorption range and a high recombination rate of photogenerated carriers in TiO2-based photoanodes,this study successfully prepared TiO2/CdS/α-Fe2O3 ternary heterojunction thin films using a combined process that integrated the hydrothermal method with the successive ionic layer adsorption and reaction method. The crystal phase,microstructure,optical properties,and photoelectrochemical characteristics of the prepared photoanodes were systematically characterized and analyzed through X-ray diffraction,scanning electron microscopy,ultraviolet-visible absorption spectroscopy,and a three-electrode photoelectrochemical testing system. The results demonstrate that CdS nanoparticles are uniformly anchored on the surface of TiO2 nanosheets,while α-Fe2O3 grows densely on the surface of the composite system in the form of regular nanospikes. The optical absorption edge of the TiO2/CdS/α-Fe2O3 ternary heterojunction film exhibits a red shift to 595 nm,which is significantly broader than those of pure TiO2 and TiO2/CdS binary composite films. Correspondingly,the maximum photocurrent density reaches 2.37 mA/cm2,approximately 24 times and 1.9 times that of pure TiO2 and TiO2/CdS,respectively. The enhanced performance of the TiO2/CdS/α-Fe2O3 photoanode is attributed to the broadening of the light-response range of TiO2 by CdS and α-Fe2O3,as well as the formation of a stepwise energy-level structure among the three components,which effectively promotes the separation and transport of photogenerated electron-hole pairs and reduces carrier recombination. This study provides a feasible strategy and experimental basis for the structural optimization and performance improvement of TiO2-based photoanodes.

Key words: TiO2; CdS; α-Fe2O3; heterojunction thin film; photoelectrochemical property

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